John A. Challenger, CEO of Challenger, Gray & Christmas said the study wasn’t an attack on fantasy football.

“We are not trying to demonize fantasy football,” Challenger said. “It is important to understand that there are more distractions than ever in today’s workplace. If it’s not fantasy football, it’s the latest Hollywood gossip, shopping on Amazon, or checking Facebook.”

Challenger also acknowledged the good things that fantasy football can do for a company.

“Companies that not only allow workers to enjoy fantasy football, but actually encourage it by organizing a company leagues, are likely to see significant benefits in morale, which, in turn leads to an overall boost in productivity as well as employee retention,” Challenger said.

Breaking it down, the study concludes that companies lose almost $900 million per week if employees spend a conservative two hours managing their fantasy football rosters. During a 15-week fantasy football season, that cost soars over $13 billion total.

By the way, NESN.com’s fantasy football preview comes out Wednesday, Aug. 20. Check it out, even from work.